Process to determine the mass flow of material from a conveyor belt, and radiometric conveyor belt scales therefor

摘要

At a plurality of points distributed locally across the width of a conveyor belt (1), a nuclear radiation is transmitted sequentially in time through the material (2) lying on the conveyor belt (1) and is detected by a single detector (11). A signal emitted by the detector is proportional to the profile of the belt filling in the transverse direction and longitudinal direction of the conveyor belt (1). Arranged below the conveyor belt (1), behind a radiation exit slit (6), running transversely with respect to the conveying direction, of a screen (7) is a rotatable support cylinder (5) which supports a plurality of helically arranged radiation sources (3) which sequentially appear below the radiation exit slit (6) when the support cylinder (5) is rotated. IMAGE